Nested Sling-Backpack Combination Bag for Flexible Storage

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Solution Overview

Problem

Existing combination-style bags often sacrifice capacity or lack sufficient functional compartments, making them inadequate for various usage scenarios.

Innovation Solution

A combination bag design that includes a single-shoulder sling bag with a foldable, flat-shaped body and a rigid support structure, which can be unfolded and securely fixed inside a double-shoulder backpack, enhancing storage capacity and functional compartments without compromising the functionality of either form.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If combination-style bags integrate both single-shoulder and double-shoulder features, then versatility is improved, but storage capacity and functional compartments are compromised

Engineering Contradiction:

ImproveversatilityVSAvoidstorage capacity

Core Design Contradiction:

Adaptability or versatilityVSVolume of stationary object

Solution Approach 1:

The single-shoulder sling bag is designed to be nested within the double-shoulder backpack when not in use. The flat-shaped bag body can be folded and placed inside the backpack's interior space, allowing the backpack to maintain its full storage capacity while still providing the single-shoulder carrying option when needed.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The combination bag is divided into separate functional components: a double-shoulder backpack for primary storage and a detachable single-shoulder sling bag component. This segmentation allows each component to fulfill its specific function independently while maintaining overall versatility when combined.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If combination-style bags include both single-shoulder and double-shoulder components, then adaptability is improved, but the number of functional compartments is reduced

Engineering Contradiction:

ImproveadaptabilityVSAvoidfunctional compartments

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The single-shoulder sling bag component serves multiple functions: it can be used independently as a single-shoulder bag, nested within the backpack as additional storage compartments, or detached for separate use. This multi-functionality increases adaptability without requiring separate dedicated components for each function.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The flat-shaped bag body with foldable structure allows the single-shoulder component to transition between different spatial configurations. When folded, it occupies minimal space within the backpack; when unfolded, it provides accessible compartments and pockets for organized storage.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS20250295218A1Combination bag

Publication Date: 2025.09.25 WAN HON LUNG

AI summary

A combination bag, includes a sling bag and a backpack with an interior space, wherein the sling bag includes: a flat-shaped and foldable bag body with a first surface and a second surface, a rigid support structure embedded within the flat-shaped bag body, symmetrically arranged along a fold line of the flat-shaped bag body; a shoulder strap attached to the flat-shaped bag body; at least two bag components positioned on the second surface of the flat-shaped bag body, for forming an independent storage compartment; and the interior space is defined by a first wall, a second wall opposite the first wall, and a continuous side wall connecting the first and second walls; wherein the first wall has an area approximately equal to that of the flat-shaped bag body, and flat-shaped bag body is detachably fixed and close contacted with the first wall by a connecting component.